/**
 * \* Created with IntelliJ IDEA.
 * \* User: 冯若航
 * \* Date: 2021/5/12
 * \* Time: 1:32
 * \* To change this template use File | Settings | File Templates.
 * \* Description:
 * \
 */
public class 相同的树 {
    public class TreeNode {
      int val;
      TreeNode left;
      TreeNode right;
      TreeNode() {}
      TreeNode(int val) { this.val = val; }
      TreeNode(int val, TreeNode left, TreeNode right) {
          this.val = val;
          this.left = left;
          this.right = right;
      }
    }
    public boolean isSameTree(TreeNode p, TreeNode q) {
        if(p == null && q == null) {
            return true;
        }if(p == null || q == null) {
            return false;
        }if(p.val != q.val) {
            return false;
        }return isSameTree(p.left, q.left) && isSameTree(p.right, q.right);
    }
}